介绍了一种基于空间冷原子铷钟的激光冷却光学平台设计。该平台是我国以空间工程应用为目标而研制的激光冷却原子光学平台，能够为空间冷原子钟提供5路连续单模稳频激光，用于冷原子的制备、操控、选态和探测。该平台采用分布布拉格反射(DBR)激光器作为87Rb原子激光冷却光源，所有光机组件通过小型化、模块化设计集成在一块300 mm×290 mm×10 mm的铝基碳化硅基板上，通过力学仿真分析优化结构设计、热仿真分析优化基板热设计，使该平台满足航天设备设计要求。经过地面严格的环模实验测试，证明该光学平台同时具备高精度、高稳定性和高可靠性，可长时间稳定工作而无需人工调节，可广泛应用于各种需要激光冷却操控原子技术的科学研究和工程项目。

An optical assembly, designed for the cold atomic clock of space experiment, is described. This optical system is used for atomic cooling, moving molasses, state preparing and clock signal detecting under microgravity environment in space. Distributed Bragg reflection (DBR) lasers has been firstly used in laser cooling of 87Rb atoms in space. All the optical and mechanical components are integrated in a 300 mm × 290 mm × 10 mm aluminum silicon carbide baseplate. Comparing with the conventional optical systems for laser cooling, the system is more compact, more robust and miniaturized. This optical setup has operated for about one year in fountain clock, ground tested by the rigorous tests of thermal and mechanical vibration, keeping high performance with no alignment needed.